what's the difference between a zero fret and a non zero fret?
I was just looking at P90's actually, saw the Gibson SG Jr which looks real tasty, though has no neck pickup :(
The Eggle one has a neck pickup (it was factory fitted too).
The zero fret is simply a fret very close to the nut, some people feel that the strings slide a little on bends.
They are pretty uncommon these days, companys such as John Birch, and Shergold used them, and I believe Mt Iommi prefers them
some swear by them, some swear at them